package day12_集合.homeWork;

import java.math.BigInteger;

public class dami {
    public static void main(String[] args) {

        BigInteger a = new BigInteger("1");
        BigInteger b = new BigInteger("1");


        for (int i = 0; i < 65; i++) {
            b = b.add(a);
            a = a.multiply(BigInteger.valueOf(2));
        }
        System.out.println(b);
    }
}
